Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
DuraFlex Chimney Cleaning & Sweep in Leesburg: What to Know First
A DuraFlex chimney cleaning and sweep in Leesburg typically runs $189-$289 for a standard one-flue system, and most jobs are completed in a single visit with a camera-verified photo record before we pack up. We work on DuraFlex liners as an independent DuraFlex service provider, which means we’re free to tell you plainly what’s wrong, what it costs, and what can safely wait. If you own a DuraFlex liner and haven’t had it looked at in the past year, call (571) 601-3174 and Corrine Halstead will walk you through exactly what to expect before anyone sets foot in your home. This page is written for DuraFlex owners in Leesburg who want the real failure modes, real prices, and a process they can hold us to in writing.

How DuraFlex Products Fail - and How We Fix Them
DuraFlex makes a solid product line, but every liner system has its weak points. Here’s what we actually find on DuraFlex jobs in Leesburg homes, and what we do about it.
- DuraFlex 304L and 316L flex liners: teardrop distortion at the termination cap. The flexible corrugations on DuraFlex’s 304L and 316L alloy liners can deform into a teardrop shape where the cap clamps down, usually because the original installer over-torqued the band or the masonry settled. We see this on older homes near Balls Bluff Battlefield where stonework shifts over decades. During a sweep we inspect the top three feet of liner for out-of-round, and if we find it, we re-round and re-band before it becomes an airflow restriction that backs smoke into the house.
- DuraFlex Duraliner rigid sections: creosote bridging at the joints. Duraliner’s rigid stainless sections are great for straight runs, but the slip joints collect creosote in a way flex pipe doesn’t. In Leesburg, where shoulder-season fires are common, we see Class II and III creosote accumulate at these seams faster than homeowners expect. Our fix is a mechanical sweep with a poly brush sized to the exact liner diameter, plus a camera pass to confirm the joints are clear, not just “probably clear.”
- DuraFlex 316Ti liner in wood-burning appliances: pitting from high-sulfur fuel. The titanium-stabilized 316Ti alloy handles heat well, but wood with high sulfur content, particularly some locally sourced oak, can pit the liner over several seasons. We document pitting with the camera so you can see it, then give you a straight answer: monitor it another year or replace the affected section now. We don’t schedule a replacement because a reading looked marginal.
- DuraFlex Smooth Wall liner: creosote adhesion in low-draft chimneys. Smooth Wall’s interior surface is meant to resist buildup, but in Leesburg chimneys with marginal draft, or short flues on single-story additions, creosote still adheres. We clean these with a poly brush and document the draft reading before and after so you know the sweep actually improved airflow, not just made the pipe look clean.
- DuraFlex stainless caps and rain pans: galvanic corrosion at the band contact. Where the stainless cap meets a galvanized band, dissimilar-metal corrosion eats the cheaper part first. It looks like rust weeping down the cap’s base. We replace the band with a stainless equivalent, and we show you the photo of the old part so you’re never paying for a mystery.
Our DuraFlex Chimney Cleaning & Sweep Process

Every DuraFlex job in Leesburg follows the same six steps, and you get a written price before step one begins.
- 1
Call and scope. You call (571) 601-3174, tell us what appliance the DuraFlex liner serves and the last time it was swept. We give you a written price range on the call, not after we’re standing in your living room.
- 2
Arrival and setup. A named, background-checked technician arrives on schedule, in uniform, with a text sent ahead. We lay drop cloths and set up negative-pressure dust control before the first brush goes in.
- 3
Camera scan, Level 2. We run the camera down the DuraFlex liner before sweeping, because cleaning a liner with unknown damage just hides the problem. The footage is recorded and becomes part of your documented photo record under Haven Standard Clause 4.
- 4
Sweep and mechanical clean. We size the poly brush to your exact DuraFlex diameter, sweep the full length, and clean the smoke chamber and firebox. If we find Class III creosote or glaze, we document it and adjust the price to the written range you already approved.
- 5
Parts decision. If we find a failed band, a pitted section, or a deteriorated cap, we review the footage with you and quote OEM DuraFlex or quality aftermarket options in writing, with the trade-off spelled out. You decide. We never proceed without written approval.
- 6
Post-sweep camera pass and documentation. We run the camera again after cleaning, check the draft, and leave you with photos, readings, a written scope of what was done, and the written warranty under our 365-Day Done Right Promise.
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AfterWhat DuraFlex Chimney Cleaning & Sweep Costs in Leesburg
Here’s what you’ll actually pay for DuraFlex work in Leesburg, in dollars, before anyone starts the job.
| Scenario | Typical Price Range |
|---|---|
| Standard DuraFlex one-flue sweep + Level 2 camera inspection | $189-$289 |
| DuraFlex sweep with Class III creosote or glaze removal (extra labor, chemical treatment) | $320-$480 |
| Sweep + cap/band replacement (parts and labor) | $365-$640 |
| DuraFlex liner section replacement (pitted or distorted section, per 25′ liner) | $900-$1,700 |
What moves the price: how much creosote class we’re dealing with, how many flues, whether the cap or bands need replacement, and whether the liner has damage that requires more than a sweep. Every quote is written, with a written scope and written warranty, before any work starts. We offer a Free Second Opinion on any written estimate, and estimates are always free. Call (571) 601-3174 for an exact number.
Why Leesburg Homeowners Call Level Two Chimney Leesburg for DuraFlex Work

DuraFlex is a good liner, but a good liner doesn’t inspect itself. What we bring to a DuraFlex job is the same thing we’ve brought to 38,000+ chimneys since 2009: a camera down the flue before and after every sweep, photos you can see in real time, and a written price before you commit to anything. We also service HeatShield and Gelco products, which means when a DuraFlex liner has reached the end of its useful life, we can give you an honest comparison of your replacement options rather than steering you toward whatever we happen to stock. Corrine Halstead grew up learning that old buildings keep secrets, and she runs crews that treat every DuraFlex liner like it might be hiding one. The camera doesn’t lie, and neither does the price she writes down before she starts.
FAQs
No. A professional sweep with a properly sized poly brush is required maintenance under DuraFlex’s warranty terms, not a voidable modification. What voids a DuraFlex warranty is using metal scrapers, oversized brushes, or chemical treatments not approved for the specific alloy. We document the brush type and size in your written record so there’s never a warranty dispute about how the liner was cleaned.
Annually for wood-burning appliances, and every two years for gas or pellet systems, per NFPA 211. Leesburg’s humid springs and shoulder-season burn habits mean creosote and soot bond to liner walls faster than the manufacturer’s generic guidance suggests, so we recommend an annual camera check even on lightly used fireplaces. Call (571) 601-3174 to schedule a sweep and get a written price over the phone.
Sometimes. Pitted sections, distorted terminations, and failed bands are repairable when the damage is localized. What can’t be repaired is corrosion that has compromised the liner’s structural integrity across multiple corrugations, or a liner that has separated at a seam. We show you the camera footage and give you the repair and replacement prices side by side, in writing, so you’re deciding on evidence, not pressure.
Most DuraFlex sweeps in Leesburg are scheduled within five to seven business days, and we text you when the technician is on the way. We don’t promise same-day service because a proper DuraFlex job requires scheduling a named technician, not whoever happens to be in the truck. Call (571) 601-3174 and we’ll give you a written price and a firm date.
You get the full camera footage from before and after the sweep, still photos of any findings, draft readings, a written scope of what was cleaned or repaired, the written price you approved, and the written warranty under our 365-Day Done Right Promise. This is Clause 4 of the Haven Standard, and we’ve been doing it on every job since 2009.
Written by Corrine Halstead, Owner, Level Two Chimney Leesburg at Level Two Chimney Leesburg, serving Leesburg and nearby areas.





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